Find out who has taken a nude selfie, swam naked, hooked up in the back of a car and more.

Receive the latest entertainment-news updates in your inbox

The answer might surprise some of "The Ellen DeGeneres Show's" viewers. The actor, 54, and the singer, 27, both appeared on Ellen DeGeneres' eponymous talk show Thursday. Clooney was on hand to plug his film "Hail, Caesar!," while Rihanna was there to promote her album, "Anti," in addition to her upcoming tour. While there, DeGeneres asked her guests to play "Never Have I Ever."

DeGeneres, 58, handed Clooney and Rihanna paddles with the words "I Have" and "I Haven't" written on either side. She then read a series of statements to get the dirt on the world famous stars:

• "Never have I ever texted a nude selfie."
• "Never have I ever swam naked in Lake Como.
• "Never have I ever been drunk before noon."
• "Never have I ever hooked up with someone over 50."
• "Never have I ever spanked a cat."
• "Never have I ever seen a rapper naked."
• "Never have I ever hooked up in the back of a car."
• "Never have I ever forgotten the name of the person I was fooling around with."
• "Never have I ever sent a dirty text to the wrong person."

She teased Clooney about not being invited to his star-studded wedding to Amal Clooney in 2014. "You were right at the cut off line," he joked. "We only had 105 people there." After she said the wedding looked "fun," Clooney said it was because Amal is Lebanese. "Close to lesbian-ese," DeGeneres joked.

Later on, George opened up about how he proposed to Amal.

"I got down on my knee and said, 'I couldn't imagine spending the rest of my life without you.' And she kept looking at the ring and she was looking at me and she was like, 'Oh, my God,'" Clooney recalled. "And we now know because there was a playlist, so we know how long it actually took, and it was like 25 minutes. Finally I literally said, 'Look, I hope the answers yes, but I need an answer I'm 52 and I could throw out my hip pretty soon.' And she said, 'Oh, yes.'"

"It was one of those funny things," Clooney said of the human rights lawyer. "From the minute we met we just hit it off. From the minute we met, we sort of felt like we were gonna be together."

Rihanna, meanwhile, is currently single. "It's not that I'm like, 'Oh, pro single! Yes! I hate men.' I just think that I just have so much on my plate that I can't even find the time to entertain a steady relationship or anything serious, or even a text," she told DeGeneres. "Right now it's just crazy."
Top Celeb Pics: Madonna